JDSOLAR solar thin film batteries have the advantages of small mass, extremely thin thickness and bendability. The materials currently used in industrial production of solar thin film batteries are: cadmium telluride, copper indium gallium selenide, amorphous silicon, gallium arsenide and the like.
There are three main types of thin film batteries that can be industrially mass-produced: amorphous silicon thin film solar cells, copper indium gallium selenide thin film solar cells (CIGS), and cadmium telluride thin film solar cells (CdTe).
Although thin-film solar cells have appeared in the 1980s, due to the relative backwardness of science and technology, their photoelectric conversion efficiency is low, and the attenuation rate (photorecession rate) is high, which has not caused the industry (mainly application fields) in the early years. Enough attention. Statistics show that the market share of thin film solar cells in 2013 was about 1.1%. However, with the continuous advancement of academic technology, the photoelectric conversion efficiency of thin film solar cells has been rapidly improved. At present, laboratory data shows that the photoelectric conversion efficiency of existing types of thin film solar cells has approached or even surpassed that of conventional crystalline silicon solar cells. Its use of less materials, simple process, low energy consumption, low cost and other factors make it have certain advantages, and it is more and more accepted by the industry. Therefore, the thin film solar cell industry has developed rapidly. It is believed that thin film solar cells will be more widely used as the country's investment in new energy fields increases and the needs of sustainable social development.
The main advantages of thin-film solar cells are: low mass, extremely thin thickness (several microns), flexibility, and simple manufacturing process. .
The traditional crystalline silicon solar cell is composed of silicon, and the main part of the battery is fragile, which is easy to produce invisible cracks. Most of them have a layer of tempered glass as protection, resulting in heavy weight, inconvenient carrying, poor seismic resistance, high cost and more or less reduced efficiency.
The thin film solar cell overcomes the above shortcomings. In the past few years, due to backward technology, the photoelectric conversion efficiency of the thin film solar cell is not as high as that of the conventional crystalline silicon battery. The improvement of the conversion efficiency of thin-film solar cells is the main direction that the solar technology industry is constantly researching. As of mid-2015, the photoelectric conversion efficiency of cadmium telluride thin film solar cells in the laboratory has reached 21.5%. First Solar is the world's largest producer of cadmium telluride solar modules, with plans to achieve 16% efficiency in related components by 2015. At present, the efficiency of copper indium gallium selenide thin film solar cells is also over 21%, and the efficiency of related components will also reach 15%.
Currently, commercialized thin film solar cells mainly include: cadmium telluride thin film solar cells, copper indium gallium selenide thin film solar cells, and amorphous silicon thin film solar cells.